Automobile motor cooling oil



least 190 F, a viscosity ing it flesh vention are arser o-eeich.

WELSQN, OB CHICAGO, @W WHI'IIHG, INDIANA,

AUTOMOBILE MOTOR COOLING OIL.

I'a'o marriage The present invention relates to improvements in automobile motor cooling oils.

in accordance with the present invention a hydro-carbon oil product suitable for use 5 in the cooling of automobiles in place of Water, solutions of salt, such as calcium chloride, alcohol mixtures, lycerine mixtures andthe like is formed hon oil product having a flash point of at below45sec. Saybolt at 100 iii, and aboiling point rangeexte ding from about 400 F. up to about 600 F., or somewhat higher. in accordance with this invention is one havpoint of 200 to 210 F., a viscosity of 30 sec. Soybolt at 100 F., and a boiling point range of from 450 to 550 F. The oils employedfor automobile motor cooling in accordance with the present incapable of use in weather at very low temperatures, as they do not solidiiy or reach high viscosities even at very low winter temperatures, nor is there any the cooling medium. Y hydrocar- A. suitable oil for use cosity 36 sec. Saybolt at 100 Application. filed April 21, 1925 Serial 10o 24,883.

substantial change in their characteristics during use. They flow freely, forming eiiicientcooling media, do not lead to fire danger and have'substantially no injurious action upon the metallic and non-metallic parts forming the circuit for circulation for The oil may suitably'be prepared by distillin crude or other suitable oil, subject.

ing t e vapors thereof to an efl'ective ractionation and selecting a relatively close out having the specified properties.

I claim: O

1. A11 automobile motor cooling oil consisting of a hydrocarbon oil having a flash point not less than190 F., a viscosity below 45 sec. point not below 400 F. I

2. Ail automobile motor cooling oil having a flash point of 200 to 210 F., a visa F., and a boiling point range of 450 to 550 F.

ROBERT E. WILSON.

Saybolt at 100 F., on initial boiling 

